package com.gitee.cashzhang27.test.boot.activiti.controller;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.nio.charset.StandardCharsets;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * ModelEditorJsonRestResource.
 *
 * @author Cash Zhang
 * @version v1.0
 * @since 2019/04/12 11:34
 */
@Slf4j
@RestController
@AllArgsConstructor
public class ModelEditorJsonRestResource implements ModelDataJsonConstants {

  private RepositoryService repositoryService;
  private ObjectMapper objectMapper;

  @RequestMapping(
      value = "/model/{modelId}/json",
      method = RequestMethod.GET,
      produces = "application/json")
  public ObjectNode getEditorJson(@PathVariable String modelId) {
    ObjectNode modelNode = null;
    Model model = this.repositoryService.getModel(modelId);
    if (model != null) {
      try {
        if (StringUtils.isNotEmpty(model.getMetaInfo())) {
          modelNode = (ObjectNode) this.objectMapper.readTree(model.getMetaInfo());
        } else {
          modelNode = this.objectMapper.createObjectNode();
          modelNode.put(MODEL_NAME, model.getName());
        }
        modelNode.put(MODEL_ID, model.getId());
        ObjectNode editorJsonNode =
            (ObjectNode)
                this.objectMapper.readTree(
                    new String(
                        this.repositoryService.getModelEditorSource(model.getId()),
                        StandardCharsets.UTF_8));
        modelNode.put("model", editorJsonNode);
      } catch (Exception e) {
        log.error("Error creating model JSON", e);
        throw new ActivitiException("Error creating model JSON", e);
      }
    }
    return modelNode;
  }
}
